00558nam a2200145Ia 4500050002300000100003700023245007500060020001800135260003800153040002900191942000700220008004100227952012900268999001500397  aZ 711 bC37  2011   aCASSELL, K.A.  AND UMMA H.94722 0aReference and information services in the 21st century:an introduction  a9781555707408  aNeal-Schuman pubbNew York c2011  cChuka University Library  cBK230105s9999||||xx |||||||||||||| ||und||  00102lcc40708LGLaCHKbCHKcGENd2023-01-05l0oZ 711 .C37  2011 C.3p11727/2015r2023-01-05 00:00:00t3w2023-01-05yBK  c7444d7444